Starlink Maritime

Post by walrus01 » Sat, Jul 09, 2022, 12:13 AM UTC

shaklee3 wrote: post #489

walrus01 wrote: post #424

Earlier quoted context omitted.

If you think that the network engineers running starlink in Redmond are going to walk blindly into the mistakes made in excessively oversubscribed networks by every pre existing geostationary vsat consumer grade service, you must have a very low opinion of their intellect, experience and ability to research the market.

I'm not sure why this has to do with network engineers in Redmond. SpaceX doesn't control the rest of the internet, and they don't have enough POPs (and won't) to hit the latency elon promised. there's a reason why fiber internet is 30ms ping and not 15-20ms.

Post by shaklee3 » Sat, Jul 09, 2022, 12:19 AM UTC

walrus01 wrote: post #491

shaklee3 wrote: post #489

Earlier quoted context omitted.

I'm not sure why this has to do with network engineers in Redmond. SpaceX doesn't control the rest of the internet, and they don't have enough POPs (and won't) to hit the latency elon promised. there's a reason why fiber internet is 30ms ping and not 15-20ms.

The latency promised is obviously for the satellite segment, any DIA end user with a clue knows that terrestrial fiber latency to and from various places will vary based on where you are and how your local ISP is linked to nearby ix points and peers. I can tell you what the latency is on fiber from the Redmond or North bend Earth stations to downtown seattle, and it's minuscule. Same as if a person was a customer on…

Post by fshbbdssbbgdd » Sat, Jul 09, 2022, 12:34 AM UTC

kalleboo wrote: post #432

fshbbdssbbgdd wrote: post #238

Earlier quoted context omitted.

I’ve done work video calls using my friend’s starlink wifi on a remote mountain, and it’s unlimited bandwidth so this didn’t cost anything beyond the flat $110 monthly fee. Are geosynchronous services even capable of doing the bandwidth and latency needed for a two-way video call? And if so, how much would it cost?

My parents are on Sky Muster in Australia and it works fine for them, we call them a couple times a month and the latency isn't amazing but I've had worse calls with people on DSL.

Post by walrus01 » Sat, Jul 09, 2022, 12:39 AM UTC

shaklee3 wrote: post #492

walrus01 wrote: post #490

Earlier quoted context omitted.

Even if viasat's consumer service was handing out high quality steel 1.8 meter elliptical offset ku band dishes with norsat PLL LNBs and 8W BUCs to consumers, the path loss and modulations required would mean that a given section of contended (let's say, 10MHz of a transponder) service to many terminals would still have significantly lower speeds and greater oversubscription to be economically viable compared to what…

that's simply not true. they have transponders that should deliver 10Gbps to a single user IF they were willing to pay for both the service and terminal. SpaceX is limited in the exact same way, and their terminals + satellite costs are much higher for the number of them.

Post by pclmulqdq » Sat, Jul 09, 2022, 1:18 AM UTC

FeepingCreature wrote: post #461

pclmulqdq wrote: post #459

Earlier quoted context omitted.

This calculation illustrates the problems of subtracting a big number from another big number. Here's some of my math: * Each customer brings in $1.2k/year. * Satellites have 20 gbps of bandwidth, and consumers today are reporting about 50 mbps links. * Maximum capacity is then ~1000 customers/sat because a 50 mbps connection takes 100 mbps of capacity to run duplex, and you need to double that again because customer…

See my model over at https://www.getguesstimate.com/models/20609 The biggest factor driving disagreement seems to be satellite lifetime. You also didn't account for oversubscription. edit: Though- > Let's raise the unit cost to $1.5 million assuming a very good yield on satellites making it to orbit. How do you get that?! Starlink don't lose 30% of sats, lol.